Choose a database management system: There are several options available such as Microsoft Access, FileMaker Pro, or MySQL. Choose one that best suits your needs and is compatible with your computer.

Design the database structure: Decide on the fields you want to include in your address book, such as name, address, phone number, email, and notes. Make sure to include fields that will make it easy to search and sort the data.

Create the database: Use the chosen database management system to create a new database and input the fields you have designed. Make sure to set up the database in a way that allows for easy data entry and editing.

Populate the database: Input the data for your contacts by manually entering the information or by importing it from an existing file, such as a spreadsheet.

Test and refine: Test the database by searching and sorting the data to ensure it is working properly. Make any necessary adjustments to the database structure or data input process.

Back up: Regularly back up your address book database to ensure that your data is safe and can be restored in case of any issues.

Keep it updated: Keep your address book up-to-date by regularly updating the data and adding new contacts as needed.